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300-410 Practice Question: Examine this partial configuration on router R5:…
Examine this partial configuration on router R5:
flow record RECORD-3 match ipv4 source address match ipv4 destination address match ipv4 protocol collect routing source as collect routing destination as ! flow monitor MONITOR-5 record RECORD-3 cache timeout active 60 !
interface GigabitEthernet0/5 ip flow monitor MONITOR-5 input
!
What is missing or incorrect in this configuration?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The router must have BGP configured and the flow record must include 'match ipv4 bgp source-as' and 'match ipv4 bgp destination-as' to collect AS numbers.
This question tests knowledge of BGP AS number collection requirements in Flexible NetFlow.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The flow record is missing 'match ipv4 source prefix-length' and 'match ipv4 destination prefix-length' to collect AS numbers.
Why it's wrong here
Prefix-length is not required for AS collection; the 'collect routing source as' command is sufficient.
- ✓
The router must have BGP configured and the flow record must include 'match ipv4 bgp source-as' and 'match ipv4 bgp destination-as' to collect AS numbers.
Why this is correct
To collect BGP AS numbers, the flow record must match BGP AS attributes using 'match ipv4 bgp source-as' and 'match ipv4 bgp destination-as'. The 'collect routing source as' command alone is insufficient without the corresponding match.
- ✗
The flow monitor is missing the 'cache timeout inactive' command to properly age out flows.
Why it's wrong here
While an inactive timeout is recommended, it is not mandatory; the configuration is valid without it.
- ✗
The configuration is correct; AS numbers will be collected automatically from the routing table.
Why it's wrong here
AS numbers are not automatically collected; they must be explicitly matched and collected in the flow record.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.